If you still believe that a hand-written letter carries more emotional weight than an auto-generated response to a text message, these star-filled envelopes will even let you send an entire galaxy to your friends and loved ones—if they peer inside.

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Once they’ve neatly sliced off the end of the envelope (not torn it to shreds) and emptied its contents, all the receiver needs to do is hold it up to a light source to see an astronomically-accurate group of constellations.

It’s an especially thoughtful way to send a letter if the person you’re writing to lives in a big city with too much light pollution to ever get a good look at the stars overhead.

You can buy a package of five star-filled envelopes from the Japan Trend Shop, which is probably the easiest way to import them. The only catch is they’ll charge you $83, plus the cost of shipping. Ouch.

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You can also buy them directly from the Kaminokousakujo’s online store in Japan for about $10. Having them delivered to North America might be a little more challenging, but the cost savings is almost certainly worth the risk.